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Pension and Postretirement Benefits Other Than Pension Plans (Tables) | 9 Months Ended
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Sep. 30, 2016
Pension Plan [Member] |
Net Periodic Pension and Postretirement Benefit (Income) Expense | Net periodic pension expense reflected in the accompanying condensed consolidated statements of operations included the following components for the respective periods (in thousands):
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2016 |  |  | 2015 |  |  | 2016 |  |  | 2015 |
Interest cost |  | $ | 966 |  |  | $ | 1,005 |  |  | $ | 2,896 |  |  | $ | 2,977 |
Expected return on plan assets |  |  | (1,021 | ) |  |  | (1,142 | ) |  |  | (3,061 | ) |  |  | (3,518 | )
Amortization of net actuarial loss |  |  | 307 |  |  |  | 258 |  |  |  | 921 |  |  |  | 875 |
Net settlement loss |  |  | 1,567 |  |  |  | 1,593 |  |  |  | 1,567 |  |  |  | 1,593 |
Total net periodic pension expense |  | $ | 1,819 |  |  | $ | 1,714 |  |  | $ | 2,323 |  |  | $ | 1,927 |
Other Postretirement Benefit Plan [Member] |
Net Periodic Pension and Postretirement Benefit (Income) Expense | Net postretirement benefit income reflected in the accompanying condensed consolidated statements of operations included the following components for the respective periods (in thousands):
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2016 |  |  | 2015 |  |  | 2016 |  |  | 2015 |
Interest cost |  | $ | 30 |  |  | $ | 53 |  |  | $ | 90 |  |  | $ | 159 |
Amortization of net actuarial loss |  |  | 60 |  |  |  | 118 |  |  |  | 181 |  |  |  | 354 |
Amortization of prior service credit |  |  | (328 | ) |  |  | (329 | ) |  |  | (985 | ) |  |  | (986 | )
Total net postretirement benefit income |  | $ | (238 | ) |  | $ | (158 | ) |  | $ | (714 | ) |  | $ | (473 | )

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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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